ОДЗ:
[tex]x\neq -1, x\neq 0[/tex]
[tex]y=\frac{5x^2+4x-1}{x+1} - \frac{x^2-3x}{x}=\frac{5x^2+5x-x-1}{x+1} - \frac{x(x-3)}{x}=\\\\\frac{5x(x+1)-(x+1)}{x+1} - (x-3)=\frac{(x+1)(5x-1)}{x+1} - (x-3)=5x-1-x+3=4x+2[/tex]
f(-1)=4·(-1)+2=-4+2=-2
(-1;-2) - точкa незакрашеннaя
f(0)=4·0+2=0+2=2
(0;2) - точкa незакрашеннaя
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Answers & Comments
ОДЗ:
[tex]x\neq -1, x\neq 0[/tex]
[tex]y=\frac{5x^2+4x-1}{x+1} - \frac{x^2-3x}{x}=\frac{5x^2+5x-x-1}{x+1} - \frac{x(x-3)}{x}=\\\\\frac{5x(x+1)-(x+1)}{x+1} - (x-3)=\frac{(x+1)(5x-1)}{x+1} - (x-3)=5x-1-x+3=4x+2[/tex]
f(-1)=4·(-1)+2=-4+2=-2
(-1;-2) - точкa незакрашеннaя
f(0)=4·0+2=0+2=2
(0;2) - точкa незакрашеннaя